It’s an app that tells residents of Israel it’s time to take cover because a terrorist rocket is headed their way.

In other parts of the world, it’s an app that some people use to pray for the people of Israel…and for others, it’s a siren that’s driving them crazy.

Red Alert Israel has been downloaded over 780,000 times in the last week, with about half of the downloads happening outside of Israel.  The app was created in 2012 by software developer Ari Sprung and his partner Kobi Snir, who feared that some residents would not be able to hear the new “Red Color” emergency sirens in their homes.

“People were having a hard time,” said Sprung. “They couldn’t really sleep because they were too afraid they were going to miss the sirens. The app allows them to go to bed knowing the phone will wake them up in case of an emergency.”

The app gives a 15 to 90 second warning dependent on how close the resident lives to Gaza.

Some users, however, say the app is driving them crazy because of the amount of times it goes off during the recent terrorist assault.

“Every time a rocket was launched, my phone went haywire,” Dor Eldar, a 22-year-old dance instructor from Tel Aviv, told the Daily Beast. “I finally had to get rid of it. It was driving me nuts.”

In America and other western nations, users of the app have been seeing the app’s siren song as a call to prayer for the Jewish people.  William Koenig recently praised the app on the Jim Bakker Show.

“The beauty of this (almost a million people now have this app on their iPhone and I’ve been reading it very closely) is the prayer of support from Christians that go on. They can respond to these alerts and encourage people through prayers and comments. And it’s beautiful to see how many Christians right now have this on their iPhones so they can pray – so they can pray to God to cover and protect the state of Israel as these rockets fall,” Koenig said.

The app is available in the iPhone app store.